dump_syms produces incomplete CFI info on iOS because it doesn't support
converting compact unwind to Breakpad symbols. Attempting to use
incomplete CFI can result in infinte stack traces.
Bug: google-breakpad:764
Change-Id: Id042aa515d17928cb5503a79038607d95c56238d
Reviewed-on: https://chromium-review.googlesource.com/1128252
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
When DW_AT_MIPS_linkage_name doesn't demangle, breakpad currently throws
the symbol completely, but in some cases, there is no DW_AT_name or
DW_AT_abstract_origin to figure out a name, and the raw value from
DW_AT_MIPS_linkage_name is still better than nothing. Fall back to that
in when there is nothing else.
R=ted@mielczarek.org
Change-Id: I5cc7580244f2b99f5f1f279d09b904031cae1a37
Reviewed-on: https://chromium-review.googlesource.com/1082176
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
endl flushes output after each line. Using "\n" instead significantly improves
I/O efficiency.
Change-Id: If6a5549fc3613ca3a7c9a71838ec36c5b7a20580
Reviewed-on: https://chromium-review.googlesource.com/1077626
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
For common signals: SIGILL, SIGFPE, SIGSEGV, and SIGBUS.
Change-Id: I80048f70445c3fa6accd548704c5700b3bed12a4
Reviewed-on: https://chromium-review.googlesource.com/1012589
Reviewed-by: Robert Sesek <rsesek@chromium.org>
The variables in the CL are not initialized. Even if it's safe not to
initialize them here, MSAN doesn't know that.
Bug: 394028
Change-Id: I597a7d76aa19d5789decd0f85150fa31c9655269
Reviewed-on: https://chromium-review.googlesource.com/1001573
Reviewed-by: Lei Zhang <thestig@chromium.org>
Store the information in the exception record's exception_information
field.
Change-Id: Ie215cae2f070fdab63c3d05cc1bc4fb4b7b095fa
Reviewed-on: https://chromium-review.googlesource.com/990799
Reviewed-by: Mark Mentovai <mark@chromium.org>
for being too long.
We've seen some minidumps that fail to process because they contain
a ridiculous number of modules (usually due to something leaking shm
mappings, it looks like). They're annoying to investigate because even
minidump_dump fails to load and print the module list. This patch makes
minidump_dump effectively remove the limit on the number of modules it
will load, so inspecting the dump by hand is possible.
R=vapier@chromium.org
Change-Id: I7a55387ca4aaad8664cd4d2651052da989366027
Reviewed-on: https://chromium-review.googlesource.com/957130
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Noticed while adding an include guard presubmit check in
Chromium.
Change-Id: I9e677412d881b32a58d695208045b575bb8f8be6
Reviewed-on: https://chromium-review.googlesource.com/934448
Reviewed-by: Mark Mentovai <mark@chromium.org>
A recent configuration change made it necessary to run our tests on
Travis as root.
This change also increases the timeout of ParallelChildCrashesDontHang
to make it pass in Travis virtualized containers.
Bug: google-breakpad:753
Change-Id: I6ca8ff4513c6ea3e0646f22457f28b5c4fca6654
Reviewed-on: https://chromium-review.googlesource.com/890564
Reviewed-by: Mike Frysinger <vapier@chromium.org>
old_handlers is zeroish whenever an NSException is thrown. This caused PROT_WRITE to never be set and resulted in an EXC_BAD_ACCESS when trying to set the handler to NULL.
Change-Id: Ibb7da448204431c7602b1001f3a5216303c4c9d1
Reviewed-on: https://chromium-review.googlesource.com/899907
Reviewed-by: Mark Mentovai <mark@chromium.org>
The previous change to fix compiling on Android < N forgot to include a
helper in the ifdef, thus not fixing the problem. This change extends
the ifdef to include all helpers used by the test.
Change-Id: Ibb3030f54a81b5609a0b55ccef387a3cba22d088
Reviewed-on: https://chromium-review.googlesource.com/895240
Reviewed-by: Mike Frysinger <vapier@chromium.org>
The unittest for #752 made use of pthread_barrier_t, which is not
supported on Android. This change replaces the barrier code with a
simple sleep, which proved sufficient to trigger the race. It only
affects the test and does not affect the original fix for #752.
Change-Id: I82c32cf00899176fa09089e716ed85850b8711e6
Reviewed-on: https://chromium-review.googlesource.com/895168
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Fixes a bug where MD_EXCEPTION_CODE_MAC_PPC_ALTIVEC_ASSIST
would unintentionally get two reason strings appended.
Bug: 177475
Change-Id: I4957268328a242c7c75bbff8add98e9a48ba83ad
Reviewed-on: https://chromium-review.googlesource.com/895705
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Restoring the signal handler in ExceptionHandler::SignalHandler() can
lead to a race in scenarios where multiple threads crash within a short
time. This can cause threads to alternately try to write a minidump
without ever terminating the process.
The first thread to write a minidump will reset the signal handler to
the SIG_DFL using signal() in InstallDefaultHandler(). The next thread
to execute SignalHandler() will detect this and will reset the signal
handler to SignalHandler(). If the first thread takes too long to write
its minidump (e.g. when there are many threads), the chances increase
that the second thread will enter SignalHandler() before the first one
leaves the critical section.
After resetting the signal handler, the second thread will fail to write
a minidump (since the file already exists) and will try to reset the
signal handler to the default by calling RestoreHandlersLocked().
However, in the meantime the first thread will have entered
SignalHandler() again and will overwrite it one more time.
After that, no further attempts will be made to restore the default
signal handler and both threads will continue to re-raise the signal and
attempt to write minidump files.
This change adds a check to make sure that cur_handler.sa_sigaction is
still pointing to SignalHandler() before re-installing the handler.
To test this we start a large number of sleeping threads and two threads
that will crash simultaneously. Without the fix, this would reproducibly
lead to a loop between the two crashing threads.
Bug: 752
Change-Id: I784328cfff17ddc7476d6668354570ab867ba405
Reviewed-on: https://chromium-review.googlesource.com/855137
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Bug:
Change-Id: I02ceca2ff7cb87bb2b8f0cf02d31f9ab6d46a8da
src/tools/linux/tools_linux.gypi was using 'symupload/minidump_upload.m' whereas it should have been 'symupload/minidump_upload.cc' for linux. '.m' is for mac.
Reviewed-on: https://chromium-review.googlesource.com/840622
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Adds asm/ and machine/ directories to src/common/android/include. This
is necessary because some required files for MIPS were removed in newer
Android NDK versions, which broke Breakpad compilation.
Bug: 771171
Change-Id: Ie6a079b6b8130b549ebc6d0bc4aef0e47e7bd6c2
Reviewed-on: https://chromium-review.googlesource.com/835282
Reviewed-by: Mark Mentovai <mark@chromium.org>
Breakpad shouldn't be hacking up headers for LSS. This was eventually
fixed in LSS directly in https://codereview.chromium.org/1248033002, so
we can drop this hack on our side.
Change-Id: Iff29efe7f6af40835e0aab1f6ac3fd8d167045ef
Reviewed-on: https://chromium-review.googlesource.com/843124
Reviewed-by: Mark Seaborn <mseaborn@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Chrome somehow changed the memory mapping with hugepage enabled.
This makes the hack in CrOSPostProcessMappings more general.
BUG=chromium:793452
TEST=with this patch on Chromium,
minidump_dump *dmp shows the right information on chrome
Change-Id: Iff58bf1a712a6e66cbd2d813422db7549a3080a5
Reviewed-on: https://chromium-review.googlesource.com/837963
Reviewed-by: Mark Mentovai <mark@chromium.org>
The header states that if the controller is not -start:'ed that it will call
the block with a NULL BreakpadRef. As previously implemented, it asserted if
it was not started.
Change-Id: I3a329a773c0484dc1b74013717b68426758ea2cd
Reviewed-on: https://chromium-review.googlesource.com/829834
Reviewed-by: Mark Mentovai <mark@chromium.org>
Updates dump_syms to write the optional 'm' first field in FUNCTION and
PUBLIC records to indicate that the address corresponds to more than one
symbol.
Bug: google-breakpad:751
Change-Id: I850b0122324ed5f9ec747aa92ba354a3126a7ef9
Reviewed-on: https://chromium-review.googlesource.com/820711
Reviewed-by: Mark Mentovai <mark@chromium.org>
The mac exception_handler is included in a conditional below.
Change-Id: I505fad7ef6731706a39b7aaacc9a948800fc3069
Reviewed-on: https://chromium-review.googlesource.com/809306
Reviewed-by: Mark Mentovai <mark@chromium.org>
Adds an optional 'm' as the first field in FUNCTION and PUBLIC records
to indicate that the address corresponds to more than one symbol.
Controls this by a command line flag for now to give symbol file users
a chance to update.
Also reduces the number of IDiaSymbols retained in memory to one per
address. This reduces memory consumption by 8% when processing
chrome.dll.pdb.
Updates the processor to parse the new optional field.
Bug: google-breakpad:751
Change-Id: I6503edaf057312d21a1d63d9c84e5a4fa019dc46
Reviewed-on: https://chromium-review.googlesource.com/773418
Reviewed-by: Mark Mentovai <mark@chromium.org>
Consistently output the "least" symbol by decorated name when
multiple symbols share an address.
Testing with chrome.dll.pdb the diffs between the new and old output
look sensible, and this is actually ~20% faster than the existing
implementation.
Bug: 749
Change-Id: Ie638559b63f0eb2dcb80b1ebb579228d62c63bb2
Reviewed-on: https://chromium-review.googlesource.com/758885
Reviewed-by: Mark Mentovai <mark@chromium.org>
This enables repeatedly setting a value based on index, which avoids a
linear scan of the entry table after the first SetKeyValue().
Bug: chromium:598854
Change-Id: I9964670a09dcd8ff76180d031a373f20990bf4d8
Reviewed-on: https://chromium-review.googlesource.com/757579
Reviewed-by: Mark Mentovai <mark@chromium.org>
The lld linker has native support for creating packed relocation
sections, and as a result we can expect files with these sections to
have symbols.
Bug: chromium:742655
Change-Id: I48a50bff041146f51b3a8b730d7a778f832787f6
Reviewed-on: https://chromium-review.googlesource.com/754239
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
This relands fd0a0d2b7a which was reverted
in 5dad29423e, with a fix for guarding
kMaxSuffixLength which only used in assert()s with macros which breaks
chromium.mac/ios-device.
Change-Id: I5ee21b7f290517d6e7a0ef90b693b97f92392549
Reviewed-on: https://chromium-review.googlesource.com/751922
Reviewed-by: Mark Mentovai <mark@chromium.org>
On tvOS, the app fails to shutdown after write.
Allow exit_after_write to be false for tvOS in order to force an exit() after write.
Change-Id: Ib2e1e1d03264a2972f5607b3070f4a6287aa0a98
Reviewed-on: https://chromium-review.googlesource.com/752071
Reviewed-by: Mark Mentovai <mark@chromium.org>
This silences a warning in newer versions of clang that complains
about "register" being a deprecated keyword.
Bug: chromium:780692
Change-Id: If354b9b18421e3e910849b385c44207e0ce02590
Reviewed-on: https://chromium-review.googlesource.com/750362
Reviewed-by: Mark Mentovai <mark@chromium.org>
As of Android API level 16 tgkill is declared in the NDK version of
signal.h, which conflicts with the static definition found in
src/client/linux/handler/exception_handler.cc. This change removes
the static tgkill definition and replaces its use with sys_tgkill
from the linux syscall support library.
Bug:
Change-Id: Ic70addd8a064cfa36345d86b7e36409e2089e909
Reviewed-on: https://chromium-review.googlesource.com/738912
Reviewed-by: Mike Frysinger <vapier@chromium.org>
C++ doesn't allow skipping initialization with a goto. This means that
this code is illegal:
void func(bool b) {
if(b) goto END;
int value = 0; //error C2362 with /permissive-
//... value used here
END:
return;
}
Adding an extra scope makes the code legal. This problem is only
detected with /permissive- but now that compiling with this
switch is practical we might as well stay /permissive- clean:
https://blogs.msdn.microsoft.com/vcblog/2016/11/16/permissive-switch/
Note that compiling /permissive- clean only works with the 10.0.16299.0
SDK which currently has other issues...
Bug: 773476
Change-Id: I54e64aaef46d70a817cf7da272f76d9ae5f6a6f7
Reviewed-on: https://chromium-review.googlesource.com/740287
Reviewed-by: Mark Mentovai <mark@chromium.org>
This hides the need to provide mutable C strings, and unifies
existing basename calls and variations in a single location.
Change-Id: Idfb449c47b1421f1a751efc3d7404f15f8b369ca
Reviewed-on: https://chromium-review.googlesource.com/725731
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
If the mapping for the main executable needed to be merged (for
example, if it was linked with lld and therefore contains an r mapping
followed by an r/x mapping), we would never reach the code that makes
it the first module. Handle that situation by moving that code into
a separate loop.
This fixes an issue where breakpad_unittests fails on Android devices
when linked with lld. It appears that the glibc dynamic loader
happens to always load executables (or at least the executables that
we create) at a lower address than DSOs, so we never hit this bug on
desktop Linux.
Testing: "make check" with both gold and lld as linker. Also
breakpad_unittests when patched into Chromium on Linux (lld) and
Android (gold and lld).
Bug: chromium:469376
Change-Id: I6329e4afd2f1bf44c25a6c3e684495e21dba83a6
Reviewed-on: https://chromium-review.googlesource.com/722286
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
memory.h shadows a system header which normally isn't a problem
because of the include paths in Breakpad, but the Firefox build
system winds up with src/common in the include path so we've had
a workaround for this for years. Renaming the file lets us get
rid of that workaround and shouldn't hurt anything.
Change-Id: I3b7c4239dc77f3b2b7cf2b572a0cad88cd7e8522
Reviewed-on: https://chromium-review.googlesource.com/723261
Reviewed-by: Mark Mentovai <mark@chromium.org>
Note that the current MicrodumpProcessor::Process implementation has a
bug due to the fact that it creates a local Microdump instance, and then
holds onto a pointer to the object returned by microdump.GetMemory()
which is destroyed when microdump goes out of scope. This CL fixes the
crash by making Microdump outlive MicrodumpProcessor, which is the same
pattern that Minidump/MinidumpProcessor uses.
Bug: google-breakpad:748
Change-Id: I554b46d309649cf404523722bd9ee39e17a10139
Reviewed-on: https://chromium-review.googlesource.com/720809
Reviewed-by: Primiano Tucci <primiano@chromium.org>
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
This exception_handler_no_mach does not use Mach for exception handling
so that clients such as tvOS and watchOS that do not support mach
messages can handle POSIX signals.
Change-Id: I4a4574e58834bc590e110e6ecd1825f8af1437a2
Reviewed-on: https://chromium-review.googlesource.com/714276
Reviewed-by: Mark Mentovai <mark@chromium.org>
